This year, we organize, together with the Université de Lausanne, the Lectures on a topic of great current importance. Digital business models are challenging the existing tax principles. Are the current principles of profit taxation and VAT still appropriate for digital economy operators? The OECD is expected to issue proposals in the spring of 2018. The EU Commission has announced that if insufficient progress is made at the global level, it will come up with own proposals. These are the thought provoking subjects for the 2018 Lectures. We hope that we may welcome you in Leuven on 29 March 2018.